<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Form_Decorator_Abstract */
require_once 'Zend/Form/Decorator/Abstract.php';

/**
 * Zend_Form_Decorator_FormElements
 *
 * Render all form elements registered with current form
 *
 * Accepts following options:
 * - separator: Separator to use between elements
 *
 * Any other options passed will be used as HTML attributes of the form tag.
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: FormElements.php 18951 2009-11-12 16:26:19Z alexander $
 */
class Zend_Form_Decorator_FormElements extends Zend_Form_Decorator_Abstract
{
	/**
	 * Merges given two belongsTo (array notation) strings
	 *
	 * @param  string $baseBelongsTo
	 * @param  string $belongsTo
	 * @return string
	 */
	public function mergeBelongsTo($baseBelongsTo, $belongsTo)
	{
		$endOfArrayName = strpos($belongsTo, '[');

		if ($endOfArrayName === false) {
			return $baseBelongsTo . '[' . $belongsTo . ']';
		}

		$arrayName = substr($belongsTo, 0, $endOfArrayName);

		return $baseBelongsTo . '[' . $arrayName . ']' . substr($belongsTo, $endOfArrayName);
	}

	/**
	 * Render form elements
	 *
	 * @param  string $content
	 * @return string
	 */
	public function render($content)
	{
		$form    = $this->getElement();
		if ((!$form instanceof Zend_Form) && (!$form instanceof Zend_Form_DisplayGroup)) {
			return $content;
		}

		$belongsTo      = ($form instanceof Zend_Form) ? $form->getElementsBelongTo() : null;
		$elementContent = '';
		$separator      = $this->getSeparator();
		$translator     = $form->getTranslator();
		$items          = array();
		$view           = $form->getView();
		foreach ($form as $item) {
			$item->setView($view)
			->setTranslator($translator);
			if ($item instanceof Zend_Form_Element) {
				$item->setBelongsTo($belongsTo);
			} elseif (!empty($belongsTo) && ($item instanceof Zend_Form)) {
				if ($item->isArray()) {
					$name = $this->mergeBelongsTo($belongsTo, $item->getElementsBelongTo());
					$item->setElementsBelongTo($name, true);
				} else {
					$item->setElementsBelongTo($belongsTo, true);
				}
			} elseif (!empty($belongsTo) && ($item instanceof Zend_Form_DisplayGroup)) {
				foreach ($item as $element) {
					$element->setBelongsTo($belongsTo);
				}
			}

			$items[] = $item->render();

			if (($item instanceof Zend_Form_Element_File)
			|| (($item instanceof Zend_Form)
			&& (Zend_Form::ENCTYPE_MULTIPART == $item->getEnctype()))
			|| (($item instanceof Zend_Form_DisplayGroup)
			&& (Zend_Form::ENCTYPE_MULTIPART == $item->getAttrib('enctype')))
			) {
				if ($form instanceof Zend_Form) {
					$form->setEnctype(Zend_Form::ENCTYPE_MULTIPART);
				} elseif ($form instanceof Zend_Form_DisplayGroup) {
					$form->setAttrib('enctype', Zend_Form::ENCTYPE_MULTIPART);
				}
			}
		}
		$elementContent = implode($separator, $items);

		switch ($this->getPlacement()) {
			case self::PREPEND:
				return $elementContent . $separator . $content;
			case self::APPEND:
			default:
				return $content . $separator . $elementContent;
		}
	}
}
